BenQ-Siemens: Secret Codes and Tricks for All Vintage Models — Complete Guide 2026
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This is the definitive guide to BenQ-Siemens secret codes for vintage phones. In 2005 the Taiwanese company BenQ acquired Siemens' mobile phone division, creating BenQ Mobile GmbH based in Munich — and BenQ-Siemens phones are exactly that: evolved Siemens hardware under BenQ management. The code system inherits almost everything from Siemens (same *#0606# for SP lock, same *#0003*CODE# for unlocking) adding new specific codes like ##3282# for the 3G Field Test and ##634# for the Life Time Counter.
How the BenQ-Siemens Code System Works — Read First
BenQ-Siemens uses two prefixes:
*#XXXX#— information and diagnostic codes (Siemens heritage)##XXXX#— advanced service codes (new compared to Siemens)
Continuity with Siemens:
*#0606#(SP lock),*#0003*CODE#(unlock) and language codes*#00xx#work identically on BenQ-Siemens. Anyone familiar with Siemens codes will find the BenQ-Siemens system familiar.
Universal BenQ-Siemens Codes — Full Verified List
| Code | Function |
|---|---|
*#06# + softkey |
Software version and IMEI (press softkey to see more) |
*#0606# |
SP lock status — shows secret code (remove SIM first) |
*#0003*(code)# |
SP lock unlock — enter specific NCK code |
*#0001# |
English menu |
*#0049# |
German menu |
*#0039# |
Italian menu |
*#0034# |
Spanish menu |
*#0033# |
French menu |
*#9999# |
Factory reset ⚠️ |
*12022243121 |
Easter egg — bonus screen (White House number) |
##3282# |
Field Test — real-time GSM/3G network parameters |
##634# |
Color Variant + Life Time Counter |
##778# |
Product Support Tool |
##777# |
User Content Reset |
##7820# |
SIM Lock Status |
##4678255# |
Tier3 Status |
*#07# or ##07# |
Main extras and info page |
The *#0606# Code — SP Lock Status (Siemens Heritage)
Just like on vintage Siemens phones, *#0606# shows the SP lock status:
- Without SIM: shows a hexadecimal string of the EEPROM lock — the raw "secret code"
- With SIM + softkey: shows the lock status text. "brak blokad" = no locks. A code like "234-30" indicates MCC 234 (UK), MNC 30 (T-Mobile UK)
Unlock with: *#0003*(8 digits)# — the 8 digits are the NCK code calculated from the IMEI.
The ##634# Code — Life Time Counter (BenQ-Siemens Exclusive)
This exclusive code shows two rare pieces of information:
- Color Variant — the colour variant of the model (useful for identifying limited editions)
- Life Time Counter — an internal counter recording the phone's usage lifetime
The Life Time Counter is the BenQ-Siemens equivalent of Nokia's "Warranty Data" — lets you understand how many hours of usage the phone has had, independently of the call counter.
The ##3282# Code — Field Test (BenQ-Siemens Exclusive)
The Field Test shows real-time GSM/3G parameters:
- Cell ID, LAC, MCC, MNC
- Signal strength in dBm
- Signal quality
- RF channel used
- On 3G models (E72, SL91, EF91): ability to force the network to 3G/UMTS only or 2G only
BenQ-Siemens EF81 — Full Secret Codes
The BenQ-Siemens EF81 (2005) is the most iconic model in the range — elegant clamshell with 262K TFT colour display, 1.3MP camera, MP3 player. It was the flagship product BenQ launched right after the Siemens acquisition.
IMEI: *#06# + softkey
SP lock status: *#0606# (remove SIM first)
SP lock unlock: *#0003*(8 digits)#
Language: *#0001# English | *#0039# Italian
Field Test: ##3282#
Life Time Counter: ##634#
Factory reset: *#9999# ⚠️
User Content Reset: ##777#
Easter egg — White House: *12022243121 This easter egg was also present on vintage Siemens phones — add this number to the phonebook and restart for a developer surprise.
EF81 network unlock:
- Insert non-accepted SIM
- Switch phone on
- Unlock code screen appears
- Enter the 8-digit NCK code
- Phone is now unlocked
Collector note EF81: Considered one of the best flip phones ever produced — Siemens quality mechanism + BenQ design. The external colour display with clock and notifications was very advanced for 2005. Colour variant identifiable with
##634#.
👉 View BenQ-Siemens EF81 available at Infosate
BenQ-Siemens EF91 — Full Secret Codes
The BenQ-Siemens EF91 (2006) is the EF81 evolution — clamshell with 3G/UMTS connectivity, 262K colour display, 2MP camera, FM radio.
IMEI: *#06# | SP lock: *#0606# | Unlock: *#0003*(8 digits)#
3G Field Test: ##3282# — on this model the Field Test also includes UMTS/3G parameters and allows forcing the network to 3G only
Life Time Counter: ##634# | SIM Lock Status: ##7820#
Factory reset: *#9999# ⚠️
Network unlock: same as EF81 — non-accepted SIM → enter NCK.
👉 View BenQ-Siemens EF91 available at Infosate
BenQ-Siemens S68 — Full Secret Codes
The BenQ-Siemens S68 (2005) was the first BenQ-Siemens flagship — bar phone with 262K TFT colour display, 1.3MP camera, FM radio, Bluetooth.
IMEI: *#06# | SP lock: *#0606# | Unlock: *#0003*(8 digits)#
Field Test: ##3282# | Life Time Counter: ##634# | Factory reset: *#9999#
Easter egg: *12022243121
👉 View BenQ-Siemens S68 available at Infosate
BenQ-Siemens S88 — Full Secret Codes
The BenQ-Siemens S88 (2006) was the absolute top of the range — premium clamshell with 262K colour display, 2MP camera with Xenon flash, FM radio, Bluetooth, EDGE.
IMEI: *#06# | SP lock: *#0606# | Unlock: *#0003*(8 digits)#
Field Test: ##3282# | Life Time Counter: ##634#
Product Support Tool: ##778# | Factory reset: *#9999# ⚠️
Collector note S88: The Xenon flash was extremely rare on phones in 2006 — only a handful of premium models had it. The S88 is one of the most sought-after BenQ-Siemens models also for its photographic quality which is still appreciable today.
👉 View BenQ-Siemens S88 available at Infosate
BenQ-Siemens S81, E61, E71, E72, CF61, SL80, SL91, EL71 — Secret Codes
All models: *#06# | *#0606# | *#0003*(code)# | ##3282# | ##634# | *#9999#
E72 additional: ##7820# (SIM Lock Status) | ##4678255# (Tier3 Status) The E72 was one of the first mid-range BenQ-Siemens with 3G. The ##3282# Field Test includes 3G forcing option.
SL91 collector note: Touch-sensitive navigation keys using FSR (Force-Sensing Resistor) technology — same as the LG Chocolate. 3.2MP autofocus camera. One of the slimmest sliders of 2006.
The History of BenQ-Siemens — Why the Brand Existed for Only 2 Years
In 2005 BenQ acquired the Siemens mobile phone division for €250 million — it seemed a winning deal: Siemens quality hardware + BenQ Taiwanese production efficiency. But the losses of the Siemens phone division were enormous. In 2006, after barely a year, BenQ Mobile declared insolvency. The Munich staff were made redundant.
The result was that BenQ-Siemens phones immediately became collector's items — produced for only approximately 18 effective months, with Siemens build quality and modern design. Today they are among the most sought-after European vintage phones.
Universal GSM Codes — Valid for All BenQ-Siemens GSM
PIN and PUK management:
- Change PIN:
**04*[old]*[new]*[new]# - Unlock with PUK:
**05*[PUK]*[new]*[new]#
Call forwarding:
| Code | Function |
|---|---|
##002# |
Cancel all call forwarding |
*#21# |
Check unconditional forwarding |
*#61# |
Check "no answer" forwarding |
*#62# |
Check "not reachable" forwarding |
*#67# |
Check "busy" forwarding |
**21*[number]# |
Activate unconditional forwarding |
EFR: *3370# (enable) / #3370# (disable)
Frequently Asked Questions
Do Siemens codes work on BenQ-Siemens? Yes — *#0606# for SP lock, *#0003*CODE# for unlocking, *#00xx# language codes and EFR codes work identically. BenQ-Siemens adds new ##XXXX# codes but maintains full Siemens code compatibility.
What does ##634# show exactly? The colour variant of the model (useful for limited editions identification) and the Life Time Counter — a phone usage hours counter independent of the call counter. This is genuinely unique to BenQ-Siemens.
Does *#9999# delete everything? Performs a factory settings reset. On some models it may also delete user data — make a backup beforehand.
Why did BenQ-Siemens exist for only ~2 years? BenQ acquired an already-loss-making Siemens mobile division. After losing over €600 million, BenQ Mobile declared insolvency in 2006. Despite the brief existence, BenQ-Siemens phones are high quality and today very sought-after — their rarity was created by the insolvency itself.
Original Vintage BenQ-Siemens at Infosate
At Infosate you'll find a selection of original vintage BenQ-Siemens phones — EF81, EF91, S68, S88, E72, SL91 and other iconic models of this brand that lived only two years but left an important legacy.